A sealant is a substance that is often used to block or prevent the passage of fluids between surfaces, joints, or openings in materials. In some instances, they can be used to block sound, prevent dust from making its way into crevices, and have the ability to impede the transmission of heat. In aircraft, sealants are typically used to maximize convenience, durability, comfort, and safety. As aircraft have a myriad of components that necessitate technical reinforcements, acquiring the proper sealants is paramount. With this in mind, this blog will cover three of the most common types, distinguishing features among them, and their unique applications.